1222429 has 4 divisors (see below), whose sum is σ = 1316476. Its totient is φ = 1128384.

The previous prime is 1222411. The next prime is 1222433. The reversal of 1222429 is 9242221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9242221 = 47 ⋅196643.

It can be written as a sum of positive squares in 2 ways, for example, as 416025 + 806404 = 645^2 + 898^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222429 - 2⁹ = 1221917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47004 + ... + 47029.

It is an arithmetic number, because the mean of its divisors is an integer number (329119).

2^1222429 is an apocalyptic number.

It is an amenable number.

1222429 is a deficient number, since it is larger than the sum of its proper divisors (94047).

1222429 is an equidigital number, since it uses as much as digits as its factorization.

1222429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94046.

The product of its digits is 576, while the sum is 22.

The square root of 1222429 is about 1105.6351115988. The cubic root of 1222429 is about 106.9238401764.

The spelling of 1222429 in words is "one million, two hundred twenty-two thousand, four hundred twenty-nine".